Molds & Tooling
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PMMA Mold Temperature 40-80℃
Problem Phenomenon
Products have large internal stress and transparent parts become hazy, or mold temperature too high extends the cycle and causes demolding deformation
Cause Analysis
PMMA mold temperature affects orientation stress and surface replication: low mold temperature causes rapid surface cooling with high stress, and transparent parts easily become hazy; mold temperature 40-80℃ adjusted by grade, optical parts favor the upper limit
Solution
①Mold temperature conventionally 40-80℃; ②optical transparent parts take 60-80℃; ③mold temperature controller controls temperature difference to prevent uneven stress; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
PMMA mold temperature is the main variable of stress management; optical parts prefer high rather than low, combined with annealing to achieve low-stress molding; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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